1.. _.k5identity(5): 2 3.k5identity 4=========== 5 6DESCRIPTION 7----------- 8 9The .k5identity file, which resides in a user's home directory, 10contains a list of rules for selecting a client principals based on 11the server being accessed. These rules are used to choose a 12credential cache within the cache collection when possible. 13 14Blank lines and lines beginning with ``#`` are ignored. Each line has 15the form: 16 17 *principal* *field*\=\ *value* ... 18 19If the server principal meets all of the field constraints, then 20principal is chosen as the client principal. The following fields are 21recognized: 22 23**realm** 24 If the realm of the server principal is known, it is matched 25 against *value*, which may be a pattern using shell wildcards. 26 For host-based server principals, the realm will generally only be 27 known if there is a :ref:`domain_realm` section in 28 :ref:`krb5.conf(5)` with a mapping for the hostname. 29 30**service** 31 If the server principal is a host-based principal, its service 32 component is matched against *value*, which may be a pattern using 33 shell wildcards. 34 35**host** 36 If the server principal is a host-based principal, its hostname 37 component is converted to lower case and matched against *value*, 38 which may be a pattern using shell wildcards. 39 40 If the server principal matches the constraints of multiple lines 41 in the .k5identity file, the principal from the first matching 42 line is used. If no line matches, credentials will be selected 43 some other way, such as the realm heuristic or the current primary 44 cache. 45 46 47EXAMPLE 48------- 49 50The following example .k5identity file selects the client principal 51``alice@KRBTEST.COM`` if the server principal is within that realm, 52the principal ``alice/root@EXAMPLE.COM`` if the server host is within 53a servers subdomain, and the principal ``alice/mail@EXAMPLE.COM`` when 54accessing the IMAP service on ``mail.example.com``:: 55 56 alice@KRBTEST.COM realm=KRBTEST.COM 57 alice/root@EXAMPLE.COM host=*.servers.example.com 58 alice/mail@EXAMPLE.COM host=mail.example.com service=imap 59 60 61SEE ALSO 62-------- 63 64kerberos(1), :ref:`krb5.conf(5)` 65